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Zero Day is a major original production for Netflix .
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The series stars as George Mullen, a former U.S. President living a quiet life in retirement. When a massive, coordinated cyberattack—the titular "Zero Day"—paralyzes the nation’s infrastructure and sows chaos across the globe, Mullen is called back to the front lines. He is appointed to lead a bipartisan commission tasked with uncovering the perpetrators and preventing further collapse.